To investigate the effect of the COVID-19 (coronavirus) pandemic on residential water use behavior in Japan, we conducted a web-based survey of 1310 people throughout Japan in March 2021, one year after the initial spread of coronavirus. The survey was designed to provide an average picture of Japan. The survey revealed that the time respondents spent at home increased during the pandemic for both men and women in all age groups by an average of 1 h, an increase of 9%. Changes in water use behavior increased almost in proportion to the increase in time spent at home, except for the frequency of defecation, which was limited to once a day. The amount of time spent in the washroom increased by 13%, an increase of more than 1.4 times the increase in the amount of time spent at home. The additional 40% increase could be considered an effect of the awareness of disease prevention. The coronavirus pandemic is expected to end in the near future. In Japan, the pandemic has led to a strong push for the reform of work styles. Therefore, even in a post-coronavirus-pandemic society, changes in work styles may normalize the increased time spent at home and the proportional increase in water use. However, because the change in water use behavior caused by quarantine awareness is a result of the fear of coronavirus infection, it is possible that water use will gradually return to pre-pandemic levels once the source of the fear is removed. To reflect the changes in water use behavior in the design of facilities in the post-coronavirus-pandemic society, it is necessary to continue this survey even once the pandemic has ended.
ABSTRACT; The structure by which the outflow corruption to river which has brought about organic matter inflow to which population, processing of an organic matter superfluous in the river basin region area of the big city to which concentration of industry went, consumption, and abandonment exceed the environmental capacity in the river basin region area, and the corruption load of point and non-point in the ocean space carried out are finally discharged by the exclusive ocean space of a mouth of a river through a river has caused the present serious aggravation as a result.In this paper, the generating distribution of the organic waste in a city region was calculated in Saitama Prefecture and the Arakawa river basin region area over Tokyo using the calculation system utilizing GIS. Evaluation results identify about the application possibility of small-scale biomass energy use among the circulation use systems of an organic matter on it.
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